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Size Matters
You play as a scientist who is shrinking every second in a race against time! Find all the ingredients and formulas scattered around the laboratory, which are necessary for producing the life-saving antidote. But beware, your time is very precious.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via SteamSpy as of 2026-05-13.
“A really cute physics puzzle game with lots of settings to go nuts with. I recommend it for a quick fix.”
— a player, Steam review · 3 hrs played“This game honestly surprised me. The idea sounds simple at first, but it gets chaotic really fast in a fun way. You're constantly under pressure while your size keeps changing, which makes even small tasks feel stressful (in a good way). It’s one of those games where you keep…”
— a player, Steam review · 13 hrs played“An average escape room styled game. Search the room for the answers while mixing the right flasks for the antidote. Not bad for a casual muck around but nothing special here to boast about. Personal Rating: 3/5 Stars (Average).”
— a player, Steam review · 5 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-08-02 20:16 UTC · history via SteamCharts.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
AtmaSphere 2
Hey everyone! Hope you are doing well! I am happy to let you know that I'm working on a sequel to Atmasphere! Find it here on Steam: https://store.steampowered.com/app/2509120/AtmaSphere_2/ You can al
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You play as a scientist who is shrinking every second in a race against time! Find all the ingredients and formulas scattered around the laboratory, which are necessary for producing the life-saving a
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Update 1.1.3
Patch notes for Update 1.1.3 You can now mark formulas visually. You need to pick them up to be able to mark them. You can also mark the ones on the board while you having your cursor on them. (defaul
Update 1.1.2
Patch notes for Update 1.1.2 - WORKING ON FIXING SOME TRANSLATION ERRORS - Small UI translation fixes Translated some texts that happened not to be translated properly End screen is now properly blure
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-13.
| Genres | Action, Adventure, Casual, Indie, Racing, Simulation |
| Player tags | Simulation · Casual · Science · Indie · Education · Sandbox · Funny · Management · Puzzle · First-Person · Action · Singleplayer (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Cloud · Family Sharing |
| Languages | English * , German * , Spanish - Spain * , Czech * , Polish * , Portuguese - Portugal * , Russian * , Simplified Chinese * , Italian * , Portuguese - Brazil * , Spanish - Latin America * , Turkish * , Greek * , Japanese … |
| Achievements | 57 |
| Estimated owners | 50,000 – 100,000 (SteamSpy) |
Minimum system requirements (PC)
Minimum: OS *: Windows 7/8.1/10 32-bit or 64-bit Processor: Quad Core 2.6 GHz Memory: 4 GB RAM Graphics: Nvidia GTX 650 Ti 2GB or AMD Radeon HD 7970 3GB DirectX: Version 11 Storage: 4 GB available space